Patents by Inventor Fred Sundström

Fred Sundström has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11958004
    Abstract: In a method and a system for purification of contaminated oil, the contaminated oil and a liquid separation aid are provided in a mixing tank and then mixed into a mixture. Thereafter, the mixture is filtered.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: April 16, 2024
    Assignee: SKF RECONDOIL AB
    Inventors: Thomas Persson, Tomas Östberg, Fred Sundström
  • Patent number: 11752452
    Abstract: A method and a system for purification of oil, said method comprising the steps of: -providing separation aid and oil to be purified to at least one sedimentation tank; -waiting for allowing a sludge phase to sediment to a bottom part of the sedimentation tank, said sludge phase comprising the separation aid together with impurities from the oil; -removing an oil phase not comprising said sludge phase from the at least one sedimentation tank; and -filtering said oil phase through a depth filter for removing any possible remaining separation aid and impurities.
    Type: Grant
    Filed: August 30, 2022
    Date of Patent: September 12, 2023
    Assignee: Recondoil Sweden AB
    Inventors: Fred Sundström, Thomas Persson
  • Publication number: 20220410038
    Abstract: A method and a system for purification of oil, said method comprising the steps of: -providing separation aid and oil to be purified to at least one sedimentation tank; -waiting for allowing a sludge phase to sediment to a bottom part of the sedimentation tank, said sludge phase comprising the separation aid together with impurities from the oil; -removing an oil phase not comprising said sludge phase from the at least one sedimentation tank; and -filtering said oil phase through a depth filter for removing any possible remaining separation aid and impurities.
    Type: Application
    Filed: August 30, 2022
    Publication date: December 29, 2022
    Inventors: Fred SUNDSTRÖM, Thomas Persson
  • Patent number: 11458420
    Abstract: A method and a system for purification of oil, said method comprising the steps of: —providing separation aid and oil to be purified to at least one sedimentation tank; —waiting for allowing a sludge phase to sediment to a bottom part of the sedimentation tank, said sludge phase comprising the separation aid together with impurities from the oil; —removing an oil phase not comprising said sludge phase from the at least one sedimentation tank; and —filtering said oil phase through a depth filter for removing any possible remaining separation aid and impurities.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: October 4, 2022
    Assignee: Recondoil Sweden AB
    Inventors: Fred Sundström, Thomas Persson
  • Publication number: 20220111317
    Abstract: In a method for reconditioning an industrial oil and in an oil recovery system therefor, a used industrial oil is reconditioned by adding a liquid separation booster to the used industrial oil, and then the separation booster with attracted impurities is separated from the used industrial oil while leaving at least one specific additive in the oil. The separation booster is designed to attract impurities in the used oil while not attracting at least one specific additive in the oil.
    Type: Application
    Filed: March 2, 2020
    Publication date: April 14, 2022
    Inventors: Fred SUNDSTRÖM, Tomas ÖSTBERG, Thomas PERSSON
  • Patent number: 11247147
    Abstract: A system (1; 101) and a method for purification of oil, said system comprising:—at least one feed tank (3) comprising oil to be purified;—a separation aid dosing device(13);—at least one basic sedimentation tank (21a, 21b) comprising at least one inlet (23a, 23b) connected to the feed tank (3) and to the separation aid dosing device (13) for receiving oil to be purified and separation aid, said at least one basic sedimentation tank (21a, 21b) further comprising at least one sludge phase outlet (41a, 41b) provided in a bottom part (37a, 37b) of the basic sedimentation tank and at least one oil phase outlet (39a, 39b);—at least one advanced sedimentation tank (121) comprising at least one sludge phase inlet (122) connected to the at least one sludge phase outlet (41a, 41b) of the at least one basic sedimentation tank (21a, 21b), said advanced sedimentation tank (121) further comprising at least one sludge phase outlet (141; 141a, 141b) connected to a sludge tank (143) and at least one oil phase outlet (139a, 13
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: February 15, 2022
    Assignee: RECONDOIL SWEDEN AB
    Inventors: Fred Sundström, Thomas Persson
  • Publication number: 20220016554
    Abstract: In a method and a system for purification of contaminated oil, the contaminated oil and a liquid separation aid are provided in a mixing tank and then mixed into a mixture. Thereafter, the mixture is filtered.
    Type: Application
    Filed: February 3, 2020
    Publication date: January 20, 2022
    Inventors: Thomas PERSSON, Tomas ÖSTBERG, Fred SUNDSTRÖM
  • Patent number: 11130075
    Abstract: A purification system and a method for purification of slop oil and industrial emulsions, wherein the purification system can handle two processes in parallel, a slop oil purification process and an industrial emulsion purification process, said system comprising: —at least one slop oil centrifugal separator (5) into which slop oil is provided for separation of water and oil; —at least one emulsion centrifugal separator (25) into which an industrial emulsion is provided for separation of oil and water; —a first redirecting fluid connection (37, 37?) arranged for transferring oil separated from the industrial emulsion in the emulsion centrifugal separator (25) to the slop oil centrifugal separator (5) possibly via a slop oil tank (3).
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: September 28, 2021
    Assignee: ROCCO Slop AB
    Inventors: Fred Sundström, Thomas Persson, Fredrik Ajnefors
  • Patent number: 10995279
    Abstract: A method and a system for purification of contaminated oil. Said method comprises the steps of: —providing contaminated oil and a separation aid in a tank (3); —waiting for allowing a sludge phase comprising the separation aid together with impurities from the oil to settle in a bottom part (4) of the tank (3); —reusing the sludge phase for purification of new contaminated oil.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: May 4, 2021
    Assignee: Recondoil Sweden AB
    Inventors: Fred Sundström, Thomas Persson
  • Patent number: 10994225
    Abstract: Tank for holding contents which can separate into different phases, said tank comprising at least two outlet pipes each provided through a bottom of the tank with a first end of the outlet pipes provided outside the tank and a second end provided inside the tank, the second ends of the at least two outlet pipes being provided at different heights within the tank.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: May 4, 2021
    Assignee: Rocco Slop AB
    Inventors: Fred Sundström, Mikael Jönsson, Thomas Persson
  • Publication number: 20210101094
    Abstract: A method and a system for purification of oil, said method comprising the steps of: —providing separation aid and oil to be purified to at least one sedimentation tank; —waiting for allowing a sludge phase to sediment to a bottom part of the sedimentation tank, said sludge phase comprising the separation aid together with impurities from the oil; —removing an oil phase not comprising said sludge phase from the at least one sedimentation tank; and —filtering said oil phase through a depth filter for removing any possible remaining separation aid and impurities.
    Type: Application
    Filed: April 24, 2018
    Publication date: April 8, 2021
    Inventors: Fred SUNDSTRÖM, Thomas PERSSON
  • Publication number: 20200230520
    Abstract: A purification system and a method for purification of slop oil and industrial emulsions, wherein the purification system can handle two processes in parallel, a slop oil purification process and an industrial emulsion purification process, said system comprising: —at least one slop oil centrifugal separator (5) into which slop oil is provided for separation of water and oil; —at least one emulsion centrifugal separator (25) into which an industrial emulsion is provided for separation of oil and water; —a first redirecting fluid connection (37, 37?) arranged for transferring oil separated from the industrial emulsion in the emulsion centrifugal separator (25) to the slop oil centrifugal separator (5) possibly via a slop oil tank (3).
    Type: Application
    Filed: May 8, 2017
    Publication date: July 23, 2020
    Inventors: Fred SUNDSTRÖM, Thomas PERSSON, Fredrik AJNEFORS
  • Publication number: 20200061498
    Abstract: A system (1; 101) and a method for purification of oil, said system comprising:—at least one feed tank (3) comprising oil to be purified;—a separation aid dosing device(13);—at least one basic sedimentation tank (21a, 21b) comprising at least one inlet (23a, 23b) connected to the feed tank (3) and to the separation aid dosing device (13) for receiving oil to be purified and separation aid, said at least one basic sedimentation tank (21a, 21b) further comprising at least one sludge phase outlet (41a, 41b) provided in a bottom part (37a, 37b) of the basic sedimentation tank and at least one oil phase outlet (39a, 39b);—at least one advanced sedimentation tank (121) comprising at least one sludge phase inlet (122) connected to the at least one sludge phase outlet (41a, 41b) of the at least one basic sedimentation tank (21a, 21b), said advanced sedimentation tank (121) further comprising at least one sludge phase outlet (141; 141a, 141b) connected to a sludge tank (143) and at least one oil phase outlet (139a, 13
    Type: Application
    Filed: April 24, 2018
    Publication date: February 27, 2020
    Inventors: Fred SUNDSTRÖM, Thomas PERSSON
  • Publication number: 20200056102
    Abstract: A method and a system for purification of contaminated oil. Said method comprises the steps of: —providing contaminated oil and a separation aid in a tank (3); —waiting for allowing a sludge phase comprising the separation aid together with impurities from the oil to settle in a bottom part (4) of the tank (3); —reusing the sludge phase for purification of new contaminated oil.
    Type: Application
    Filed: April 24, 2018
    Publication date: February 20, 2020
    Inventors: Fred SUNDSTRÖM, Thomas PERSSON
  • Publication number: 20200054968
    Abstract: Tank for holding contents which can separate into different phases, said tank comprising at least two outlet pipes each provided through a bottom of the tank with a first end of the outlet pipes provided outside the tank and a second end provided inside the tank, the second ends of the at least two outlet pipes being provided at different heights within the tank.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 20, 2020
    Inventors: Fred SUNDSTRÖM, Mikael JÖNSSON, Thomas PERSSON
  • Patent number: 6974030
    Abstract: A screw magazine includes a form-stiff framework (1) having a front side (4) and a back side (5) between which a plurality of mutually spaced-apart bores (10) extend, each one of which is delimited by an endless limiting wall (11) of a resilient, demolishable nature and of which at least some house screws (12) located at a distance from each other. The length of the individual screw (12) is smaller than the depth of the framework (1) counted as the distance between the front and back sides (4, 5), a free tip of the individual screw being located at a certain distance inside the back side of the framework, at the same time as an end surface on the head of the individual screw (12) is situated in flush with the front side (4) of the framework.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: December 13, 2005
    Inventor: Fred Sundström